<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
          <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="restLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
    data() {
        return {
            // 登录数据绑定对象
            loginForm: {
                username: 'admin',
                password: '123456'
            },
            loginFormRules: {
                //验证用户名是否合法
                username:[
                     { required: true, message: '请输入用户名称', trigger: 'blur' },
                     { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                password:[
                     { required: true, message: '请输入用户密码', trigger: 'blur' },
                     { min: 6, max: 14, message: '长度在 6 到 14 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods: {
        restLoginForm(){
            this.$refs.loginFormRef.resetFields()
        },
        login(){
          this.$refs.loginFormRef.validate(async (valid)=>{
            if(!valid) return;
            const {data: res}=await this.$http.post('login',this.loginForm);
            if(res.meta.status != 200)  return this.$message.error("登录失败")
            this.$message.success("登录成功")
            // console.log(res)
            //token建议查看JWT
            window.sessionStorage.setItem('token',res.data.token);
            // 通过编程式导航跳转到后台主页，路由地址是home
            this.$router.push('/home')
          })
        }
    },
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2d4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: white;
  border-radius: 6px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  // position: relative;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px ;
    box-sizing: border-box;
}
.btns{
    display: flex;
    justify-content: flex-end;
}
</style>